ploticus is a free, GPL, non-interactive software package for producing plots, charts, and graphics from data. ploticus was developed in a Unix/C environment and runs on various Unix, Linux, and win32 systems.

ploticus is good for automated or just-in-time graph generation, handles date and time data nicely, and has basic statistical capabilities. It allows significant user control over colors, styles, options and details.

From the command line you can run ploticus using the pl command. The pl command can also be invoked via CGI. C developers can use libploticus. Other interfaces exist for packages such as Python.